| 摘要 |
An apparatus for excavating and transporting excavated material, said apparatus including a nonfloating frame structure having a pair of opposed shovels swingably supported on the opposite sides thereof. A drive mechanism is connected between the frame structure and the shovels for swingably moving the shovels relative to the frame structure. At least two buoyant bodies having a predetermined buoyancy are movably connected to the frame structure at the opposite ends thereof. An operating mechanism is connected between the frame structure and the buoyant bodies for raising and lowering the frame structure and the shovels as a unit relative to the buoyant bodies. The operating mechanism is independently operable in relationship to the drive mechanism. |
